THE FATBOY SHOW : Desertion threatens to starve Ukraine's forces at a crucial time in its war with Russia.

Desertion is starving the Ukrainian army of desperately needed manpower and crippling its battle plans at a crucial time in its war with Russia, which could put Kyiv at a clear disadvantage in future ceasefire talks.

Facing every imaginable shortage, tens of thousands of Ukrainian troops, tired and bereft, have walked away from combat and front-line positions to slide into anonymity, according to soldiers, lawyers and Ukrainian officials. Entire units have abandoned their posts, leaving defensive lines vulnerable and accelerating territorial losses, according to military commanders and soldiers.

Some take medical leave and never return, haunted by the traumas of war and demoralized by bleak prospects for victory. Others clash with commanders and refuse to carry out orders, sometimes in the middle of fire fights.